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Posted By

slhck on 09/18/12


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number scale


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Scale a number into a defined range

 / Published in: Ruby
 

Scales a number from a given range into a specific range, as explained in this Stack Overflow post.

Just call it, for example like:

0.5.scale_between(0, 1, 100, 200)

The result would be 150.

Expand | Embed | Plain Text 
  1. class Numeric
  2.   def scale_between(from_min, from_max, to_min, to_max)
  3.     ((to_max - to_min) * (self - from_min)) / (from_max - from_min) + to_min
  4.   end
  5. end

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